Were the 91 camaro's Internal balance, or external? The engine I am ready to order on this coming monday, is an older 1980 rebuilt engine with performance parts. and it will be a one piece with an external balance, the manager I spoke to said it will work fine with the stock flywheel I already have, and Im hoping its true. right?

Thanks,
Tim.

 

All sbc are internally except the 400, so yes that includes the 91. Are you getting a stroker? Thats the only thing i can think of that your new motor would be external, but no the balancer and flywheel will need to be for and exterally balanced motor and the stock stuff wont do even if it bolts up.